Headers vs Manifolds
- Thread starter MAXX IT OUT
- Start date
Me too. There is a real log style header in the makes with each runner the same length. Much like the normal shorty headers you'd find on a belair or something like that. But they have 2 different collectors. 2 ports into each one. I don't know what the final collector to uppipe setup is going to look like as they haven't finished yet. But I bought manifolds because I have heard some log style manifolds have cracked. And I just cracked a uppipe... Bellow none the less, but I choice to stay with a thick material manifold.
I argree on what your saying for an naturally aspirated engine.....so running a log style header is not really worth it, unless it is a completely custom and high powered set up.
Any log style will have turbulence from each others exhaust pulse like a manifold. Unless they run into a single collector at one spot.
Sorry to be off topic but I feel that my topic pertains to this topic,
Is the purpose of a divided exhaust housing vs an undivided exhaust housing for a turbine to help with the exhaust pulsations depending on the cylinder firing pattern?
Also, would a remote turbo mount not function properly if the exhaust pipes are not the same length from the passenger and driver side banks?
Is the purpose of a divided exhaust housing vs an undivided exhaust housing for a turbine to help with the exhaust pulsations depending on the cylinder firing pattern?
Also, would a remote turbo mount not function properly if the exhaust pipes are not the same length from the passenger and driver side banks?
The two main points that some if you are missing is what Rick is trying to say. One us exhaust energy and thermal energy is required in a turbo setup for optimal performance. Too long of piping and you loose thermo energy to the pint that you hurt performance. That is why you have short tubes on turbo diesel applications. The second pint is there us pressure on each side of the system in a turbo application so thermo energy and flow volumes become more important. A gasser that is naturally aspirated isn't as froguvi g as a diesel that is turbo charged. Gassers do not have near the thermal energy as a diesel or the cylinder pressures that create that energy.
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Also remember we do not have the 600-6000 rpm usable range either. I've spent lots of money and lots of time playing with the different styles. The turbocharged diesel engine IS a different animal. 
I see all the time where people argue about whether heat or flow drives a turbo, and I think the world would be a better place if people fighting like school kids used proper school kid terminology. Everyone go google enthalpy. It's roughly defined as a unitless convenience property expressing the sum of inertial and thermal energy in a moving fluid. Flow energy and heat both matter. Note I said flow energy not just velocity, because restricting the volume to increase velocity can be idiotic and counterproductive.
The only way to tell true performance results is experimentation and probably nobody has seen more custom exhaust setups than Rick.:thumb:
The only way to tell true performance results is experimentation and probably nobody has seen more custom exhaust setups than Rick.:thumb:
Also remember we do not have the 600-6000 rpm usable range either. I've spent lots of money and lots of time playing with the different styles. The turbocharged diesel engine IS a different animal.
Longer stroke and higher compression makes up the difference
Lower RPM's, higher exhaust temps, and more exhaust gases you could add to your list....our turbos work more in the bottom of the RPM range then to top unlike a gases engine, which need a minimum of like 3 or 4k before they will start to spool.
Just solidifying something a read... From what I have understood, a turbo works off both flow and heat, with heat increasing flow because as something heats it expands, making more flow through the charger, hence the turbo farther away from the heat source will not have as much flow through it as a turbo right off the manifold. Am I correct? This is for my own benefit.
This is not entirely true. Gasser engines produce way more cylinder psi than diesel and thermal energy. shrink the head ports, RPM and exhaust pipe size and bet the gaser could spool up instant.
Just a FYI the avg pro stock gas engine puts out 4000PSI cylinder psi
Pro mod gas engine produces between 6-7000 psi
Top alcohol is 8-9000 PSI
Top fuel is as high as 15,000 psi.
Now factor in the bore size at the listed PSI and its astounding. Very few diesels are even close to the gasser pro mod PSI level.
Thermal energy of gasoline is not as high as diesel. Compression on gasoline engines is not as high as diesels. Gasoline engines have a predetermined thermo capability as gas and air are mixed when it enters the cylinder and can;t change after that. Diesel engines fuel enter without the air and can be changed during the combustion process. on a gasoline engine the cylinder pressures go down exponentially as the piston moves down from TDC. On a diesel cylinder pressures do not go down exponentially since you have the ability to add more fuel during the process. This is the reason why a gas engine does not generate the heat a diesel does nor does it have the thermal energy. A comparable size gas engine does not close to making the torque a diesel does. I am not the smartest guy in the world but these items are why the demands between the two engines are so different.:thumb:
Sweet 8lb baby Jesus is nobody here an engineer? I already posted saying at least google enthalpy (unit less convenience property that combines inertial energy of the flow with thermal energy).
Don't even try to lump any type of alcohol engines in as "gassers"
A diesel converted to run on CNG is closer to a gasoline engine than a methanol swilling monster is.
Sorry for going way off topic but this thread is getting absurd.
Don't even try to lump any type of alcohol engines in as "gassers"
A diesel converted to run on CNG is closer to a gasoline engine than a methanol swilling monster is.
Sorry for going way off topic but this thread is getting absurd.
